I just installed WPS and removed LibreOffice and when I did Mint themes, Mint Artwork were also removed.
WHY oh WHY?
What has LibreOffice have to do with Mint themes and artwork. Fortunately I had backups so no 'real' harm done.
I presume that somewhere in there is a meta package that has dependencies set for these actions as I could not re-install what was removed.

Kingsoft Office or something like that is WPS.
I am running Mint 18 sarah with :
Kernel: x86_64 Linux 4.7.2-040702-generic
and that still beggars the question, "Why was LO removing themes and artwork?" Had to be a meta package somewhere because when I tried reinstall themes/artwork, Synaptic reported them as Broken.
OH, and as an aside, "Why the hell does installing SDDM bring in the world of KDE. I just left Antergos and was able to install SDDM with no KDE tag alongs.
So again, it has to be Meta Packages.